Package org.firebirdsql.encodings

Class DefaultEncodingDefinition

java.lang.Object

org.firebirdsql.encodings.DefaultEncodingDefinition

All Implemented Interfaces:

EncodingDefinition

public final class DefaultEncodingDefinition
extends java.lang.Object
implements EncodingDefinition

Definition of a Firebird encoding. This is the default implementation of EncodingDefinition.

Since:

3.0

Author:

Mark Rotteveel

Constructor Summary

Constructors

Constructor	Description
DefaultEncodingDefinition(java.lang.String firebirdEncodingName, java.lang.String charsetName, int maxBytesPerChar, int firebirdCharacterSetId, boolean firebirdOnly)	Initializes an instance of DefaultEncodingDefinition.
DefaultEncodingDefinition(java.lang.String firebirdEncodingName, java.nio.charset.Charset charset, int maxBytesPerChar, int firebirdCharacterSetId, boolean firebirdOnly)	Initializes an instance of DefaultEncodingDefinition.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object o)
Encoding	getEncoding()	Returns the Encoding instance for this definition.
int	getFirebirdCharacterSetId()
java.lang.String	getFirebirdEncodingName()
java.nio.charset.Charset	getJavaCharset()
java.lang.String	getJavaEncodingName()
int	getMaxBytesPerChar()
int	hashCode()
boolean	isFirebirdOnly()	Can (or should) this encoding be used for reverse mapping from Java to Firebird.
boolean	isInformationOnly()	Can this implementation create an Encoding instance, or does it provide information only (e.g.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DefaultEncodingDefinition

public DefaultEncodingDefinition(java.lang.String firebirdEncodingName,
                                 java.nio.charset.Charset charset,
                                 int maxBytesPerChar,
                                 int firebirdCharacterSetId,
                                 boolean firebirdOnly)

Initializes an instance of DefaultEncodingDefinition.

Parameters:

firebirdEncodingName - Name of the Firebird encoding

charset - Java Charset instance (null for information-only instances)

maxBytesPerChar - Maximum number of bytes per character (eg 1 for ISO8859_1, 4 for UTF8, 3 for UNICODE-FSS)

firebirdCharacterSetId - Firebird character set id

firebirdOnly - Mapping only applies from Firebird to Java, but not from Java to Firebird (e.g. Firebird UNICODE-FSS maps to Java UTF-8, but Java UTF-8 does not map to Firebird UNICODE-FSS (but to Firebird UTF8)

DefaultEncodingDefinition

public DefaultEncodingDefinition(java.lang.String firebirdEncodingName,
                                 java.lang.String charsetName,
                                 int maxBytesPerChar,
                                 int firebirdCharacterSetId,
                                 boolean firebirdOnly)

Initializes an instance of DefaultEncodingDefinition.

The actual Java character set is loaded on-demand. If the provided name cannot be resolved to a Charset at on-demand load time, it will be handled as information-only.

Parameters:

firebirdEncodingName - Name of the Firebird encoding

charsetName - Java character set name, or null for information-only instances

maxBytesPerChar - Maximum number of bytes per character (eg 1 for ISO8859_1, 4 for UTF8, 3 for UNICODE-FSS)

firebirdCharacterSetId - Firebird character set id

firebirdOnly - Mapping only applies from Firebird to Java, but not from Java to Firebird (e.g. Firebird UNICODE-FSS maps to Java UTF-8, but Java UTF-8 does not map to Firebird UNICODE-FSS (but to Firebird UTF8)

Method Detail

getMaxBytesPerChar

public int getMaxBytesPerChar()

Specified by:

getMaxBytesPerChar in interface EncodingDefinition

Returns:

Maximum number of bytes per character.

getJavaEncodingName

public java.lang.String getJavaEncodingName()

Specified by:

getJavaEncodingName in interface EncodingDefinition

Returns:

Java name of the encoding

getJavaCharset

public java.nio.charset.Charset getJavaCharset()

Specified by:

getJavaCharset in interface EncodingDefinition

Returns:

Java Charset for this encoding

getFirebirdEncodingName

public java.lang.String getFirebirdEncodingName()

Specified by:

getFirebirdEncodingName in interface EncodingDefinition

Returns:

Firebird name of the encoding

getFirebirdCharacterSetId

public int getFirebirdCharacterSetId()

Specified by:

getFirebirdCharacterSetId in interface EncodingDefinition

Returns:

Firebird id of the encoding

isFirebirdOnly

public boolean isFirebirdOnly()

Description copied from interface: EncodingDefinition

Can (or should) this encoding be used for reverse mapping from Java to Firebird.

The best example of this is the Firebird character set UNICODE-FSS which maps to the Java character set UTF-8, but when Java character setUTF-8 is requested, Jaybird should (in general) map to Firebird character set UTF8.

Specified by:

isFirebirdOnly in interface EncodingDefinition

Returns:

true when this encoding maps from Java to Firebird, false otherwise

isInformationOnly

public boolean isInformationOnly()

Description copied from interface: EncodingDefinition

Can this implementation create an Encoding instance, or does it provide information only (e.g. about unsupported character sets)

Specified by:

isInformationOnly in interface EncodingDefinition

Returns:

true if this EncodingDefinition only provides information, and is not capable of building a concrete implementation.

getEncoding

public Encoding getEncoding()

Returns the Encoding instance for this definition. The same object is returned each time this method is called.

Specified by:

getEncoding in interface EncodingDefinition

Returns:

Encoding object or null if this is an information only EncodingDefinition

See Also:

EncodingDefinition.isInformationOnly()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object